Skip rendering if alpha is 0.0

imgui.cpp

@@ -1401,6 +1401,10 @@ void Render()
 		memset(g.IO.InputCharacters, 0, sizeof(g.IO.InputCharacters));
 	}
 
+	// Skip render altogether if alpha is 0.0
+	// Note that vertex buffers have been created, so it is best practice that you don't call Begin/End in the first place.
+	if (g.Style.Alpha > 0.0f)
+	{
 		// Render tooltip
 		if (g.Tooltip[0])
 		{
@@ -1429,6 +1433,7 @@ void Render()
 		if (!g.RenderDrawLists.empty())
 			g.IO.RenderDrawListsFn(&g.RenderDrawLists[0], (int)g.RenderDrawLists.size());
 		g.RenderDrawLists.resize(0);
+	}
 }
 
 // Find the optional ## from which we stop displaying text.